6.3-2x+4.5=7.
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6.3-2x+4.5=7.6.3-2x+4.5=7.6.3-2x+4.5=7.6.3-2x+4.5=7.4-2x=7.4-6.3-4.5-2x=7.4-10.8-2x=-3.4x=1.7
6.3-2x+4.5=7.
6.3-2x+4.5=7.
6.3-2x+4.5=7.
6.3-2x+4.5=7.4
-2x=7.4-6.3-4.5
-2x=7.4-10.8
-2x=-3.4
x=1.7
6.3-2x+4.5=7.
8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2
解方程:6.9x=23.12 6（x+2）=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2.3×3=30.02 x÷（6.3-2.3）=1.16.8x+6.9x=27.4 1.8（x+0.2）=7.2 3x-4×6=48 6x+7x=26 x+3.5×3=18
6.3+4.5x=36.3-5.5x
6.3-2X=0.03+X
f(x)=x^2+x (x
4.5×4-2x-2x=6x
x/2+4.5=2x
12.5-2x=4x+7.
2.2X-3X/2=7.
2X-3.8=25.9-4.5x
7x+2x=4.5
2X-4.5=15.5-3X
y=(3x^2-x√x+5√x-9)/√x 求导我算到4.5x^0.5-1+2x+4.5x^1.5 ,
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272
设f(x)=(x^2)-8x及g(x)=(x^2)+4x-7.求f(x)+g(x)的极小值.
6.3减2x+4.5=7.4
解方程:(x-2.4)÷2=3.6 6.9x=23.12 6（x+2）=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2.3×3=30.02x÷（6.3-2.3）=1.1 6.8x+6.9x=27.4 1.8（x+0.2）=7.2 3x-4×6=48 6x+7x=26 x+3.5×3=18